129 lines
4.6 KiB
Markdown
Executable file
129 lines
4.6 KiB
Markdown
Executable file
# fan speed controller for dell R710, R520 etc
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Dells don't like having third party cards installed, and defaults to
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ramping up the fan speed to "jetliner taking off" mode when third
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party cards or non-Dell disks are added in. But you can override
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this, servoing the fans to follow the temperature demand of the
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various components (disks via hddtemp, CPUs and GPUs via sensors,
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ambient temperature via ipmitool).
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This repo is forked from NoLooseEnds/Scripts, which contained
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R710-IPMI-TEMP. I have extended it to work on my R520, being a bit
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smarter regarding the CPU and HDD temps instead of just caring about
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the ambient temperature. It uses ipmi raw commands that seem to be
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similar across a wide range of dell server generations (google
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searches for `ipmitool raw 0x30 0x30 0x01 0x00` show it works for
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R710, R730, R730xd, T130, and I run this on my R520.
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It's got a signal handler so it defaults to default behaviour when
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killed by SIGINT/SIGTERM/other bugs.
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I run it on my proxmox hypervisor directly, hence not needing any ipmi
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passwords. I start and stop it through proxmox's systemd system.
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I wrote it the night before Australia's hottest December day on record
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(hey we like our coal fondling prime-ministers). It seems to be
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coping so far now that it has reached that predicted peak (I don't
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believe it's only 26 in my un-air conditioned study).
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# installation (debian/proxmox)
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It's in my [ansible
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module](https://github.com/spacelama/ansible-initial-server-setup/tree/master/roles/dell_server)
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(which you won't want to use in full, but you can certainly adapt),
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but manual installation is:
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```
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sudo apt install liblist-moreutils-perl lm-sensors ipmitool
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# I also use my own hddtemp, since debian's hddtemp itself is unmaintained and can't deal with SAS drives and often spins up drives that are spun down:
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sudo apt remove hddtemp
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sudo cp -p fan-speed-control.pl /usr/local/bin
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sudo cp -p hddtemp /usr/local/bin
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sudo cp -p fan-speed-control.service /etc/systemd/system/fan-speed-control.service
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sudo systemctl daemon-reload
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sudo systemctl --now enable fan-speed-control.service
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```
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[Reddit discussion](https://www.reddit.com/r/homelab/comments/ed6w7y)
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# Possibly required modifications/tuning
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For the r710, you'll probably need to modify the regexps looking for "Inlet Temp" - you might need to anchor the text since it's only using grep to filter the results.
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You might want to modify setpoints and thresholds. I found it simple to test by starting up a whole bunch of busy loops on each of the 32 cores in my machine, heating each core up to 60degC and making sure the fans ramped up high.
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This script monitors the ambient air temperature (you will likely
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need to modify the $ipmi_inlet_sensorname variable to find the correct
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sensor), the hdd temperatures, the core and socket temperatures
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(weighted so one core shooting up if all the others are still cold -
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let the heatsink do its job).
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It uses setpoints and temperature ranges you can tune to your heart's
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content. I use it to keep the fans low but increasing to a soft
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volume up to 40 degrees, ramp it up quickly to 50degrees, then very
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quickly towards full speed much beyond that. It also has an ambient
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air temperature threshold of 32degrees where it gives up and delegates
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control back to the firmware. Don't run your bedroom IT closet at 32
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degrees yeah?
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# Results
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*****
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# Howto: Manually setting the fan speed of the Dell R610/R710
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1. Enable IPMI in iDrac
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2. Install ipmitool on linux, win or mac os
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3. Run the following command to issue IPMI commands:
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`ipmitool -I lanplus -H <iDracip> -U root -P <rootpw> <command>`
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**Enable manual/static fan speed:**
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`raw 0x30 0x30 0x01 0x00`
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**Set fan speed:**
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(Use i.e http://www.hexadecimaldictionary.com/hexadecimal/0x14/ to calculate speed from decimal to hex)
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*3000 RPM*: `raw 0x30 0x30 0x02 0xff 0x10`
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*2160 RPM*: `raw 0x30 0x30 0x02 0xff 0x0a`
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*1560 RPM*: `raw 0x30 0x30 0x02 0xff 0x09`
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_Note: The RPM may differ from model to model_
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**Disable / Return to automatic fan control:**
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`raw 0x30 0x30 0x01 0x01`
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**Other: List all output from IPMI**
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`sdr elist all`
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**Example of a command:**
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`ipmitool -I lanplus -H 192.168.0.120 -U root -P calvin raw 0x30 0x30 0x02 0xff 0x10`
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*****
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**Disclaimer**
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TLDR; I take _NO_ responsibility if you mess up anything.
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*****
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All of this was inspired by [this Reddit post](https://www.reddit.com/r/homelab/comments/72qust/r510_noise/dnkofsv/) by /u/whitekidney
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